What is Graham Greene trying to communicate with this passage?

6 seconds sound clip from the Donnie Darko movie soundboard.

You can hear this line at 00:22:20 in the Blu-ray version of the movie.

Quote context

[...]

- Just leave her alone.

- That's some good shit, huh?

- It's a fucking cigarette.

- There would be headlines in the papers.

- Even the grown-up gangs who ran the betting at the all-in wrestling and the Barrow boys would hear with respect of how Old Misery's house had been destroyed.

- It was as though this plan had been with him all his life, pondered through the seasons... now, in his 15th year, crystallized with the pain of puberty.

- What is Graham Greene trying to communicate with this passage?

- Why did the children break into Old Misery's house? Joanie?

- They wanted to rob him.

- If you had actually read the short story which, at a whopping 13 pages would have kept you up all night...

- You would know that the children find a great deal of money in the mattress, but they burn it.

- Donnie Darko... perhaps with your recent brush with mass destruction, you can give us your opinion.

[...]